Which statement best describes the density of the outer planets

"The correct statement is, “All the outer planets have low density.”

The outer planets such as Saturn, Jupiter, Neptune, and Uranus are the giant’s planets but in terms of density, they are less due to the gas and jovian.

The densities between the inner and outer circle are different due to the rock-solid.

Explanation:

All the outer planets have low density. The outer planets are denser than the inner planets. Saturn is dense, but the other outer planets are not

answer; i believe the answer is (polygenic inheritance;

it is either c or d and i know for sure it is not a or b